Buying a multi-unit property means choosing a residential loan program that matches how you’ll use the building, qualifying with the help of projected rent from the other units, verifying during inspection that every unit is legal and the financials are real, and then closing on a purchase that turns you into a landlord the moment the deed records. The path is smoothest for two-to-four-unit buildings, especially if you plan to live in one of the units, because those properties still qualify for standard residential mortgages.
The Four-Unit Line Decides Your Loan
Federal housing guidelines treat a building with two, three, or four units as residential real estate. At five or more rental units on a single site, the property becomes “multifamily” and financing shifts to the commercial side.1Office of the Law Revision Counsel. 12 USC 1715z-22a – Definitions That single threshold controls almost everything about the purchase.
On the residential side, you can use FHA, VA, or conventional mortgages. You get the disclosure protections of the Real Estate Settlement Procedures Act and the Truth in Lending Act. Appraisals rely on comparable sales, and underwriters weigh your personal credit alongside the building’s income.
At five units and up, lenders look mainly at the building’s income stream. Expect at least 25% down, higher origination fees, balloon payments that force refinancing after five or ten years, and prepayment penalties. Consumer Financial Protection Bureau oversight is more limited, and you’re expected to negotiate terms with a commercial mortgage broker. If your target property has five or more units, most of what follows still applies in spirit, but the loan itself works differently. The rest of this article assumes two to four units.
Financing Options for Two-to-Four-Unit Buildings
The programs available to you depend on how many units the building has and whether you’ll live in one of them. Owner-occupants get materially better terms than pure investors buying the same property.
FHA Loans
FHA-insured loans are the most accessible route if you’ll live in one unit. The minimum down payment is 3.5% of the purchase price for borrowers with a credit score of 580 or higher. Scores between 500 and 579 require 10% down. On a $400,000 triplex, 3.5% is $14,000.
For three- and four-unit buildings, FHA adds a self-sufficiency test. The monthly mortgage payment, including principal, interest, taxes, and insurance, divided by the property’s net rental income cannot exceed 100%.2U.S. Department of Housing and Urban Development. FHA Single Family Housing Policy Handbook 4000.1 The building has to pay for itself on paper. Net rental income for this test uses the appraiser’s fair market rent estimate from every unit in the building, including yours, minus a vacancy and maintenance deduction of at least 25%.3U.S. Department of Housing and Urban Development. HOC Reference Guide – Rental Income Fail the math and FHA won’t insure the loan. The test does not apply to duplexes.
If the building needs work, the FHA 203(k) rehabilitation loan lets you finance the purchase and renovations in one mortgage, and two-to-four-unit properties are eligible.4U.S. Department of Housing and Urban Development. 203(k) Rehabilitation Mortgage Insurance Program
VA Loans
Veterans and eligible service members can buy a property with up to four units using a VA-backed loan with no down payment, as long as the purchase price doesn’t exceed the appraised value.5Veterans Affairs. Purchase Loan The building must be your primary residence, with move-in expected within 60 days of closing. VA loans carry no private mortgage insurance, which saves hundreds a month compared with FHA on the same property.
Conventional Loans
Conventional financing through Fannie Mae allows as little as 5% down on a two-to-four-unit property you’ll live in.6Fannie Mae. Eligibility Matrix Any down payment below 20% triggers mortgage insurance, and premiums on a multi-unit loan run higher than on a single-family home.
Investment properties, where you won’t live in any unit, require 25% down for a conventional loan on a two-to-four-unit building.6Fannie Mae. Eligibility Matrix A $600,000 fourplex bought purely as an investment needs $150,000 at closing, plus reserves, and the interest rate will be noticeably higher than an owner-occupied loan on the same building.
Every program caps the loan amount, and the caps rise with unit count. For 2026, FHA limits in standard-cost areas run from $693,050 for a two-unit up to $1,041,125 for a four-unit, with high-cost-area ceilings well above that.7U.S. Department of Housing and Urban Development. HUD FHA Announces 2026 Loan Limits Conforming conventional limits for 2026 range from $1,066,250 for two units to $1,601,750 for four units in baseline areas.8Fannie Mae. Loan Limits Above these, you’re in jumbo territory, which usually means a larger down payment and stronger credit.
Using Rental Income to Qualify
One of the biggest advantages of buying multi-unit as your primary residence is that rent from the other units can help you qualify for a larger loan. Fannie Mae allows lenders to count 75% of expected gross rental income in the affordability calculation.9Fannie Mae. Rental Income The 25% haircut accounts for vacancies and maintenance.
Two limits catch first-time buyers off guard. If you currently have no housing payment, such as living rent-free with family, the rental income you can count is capped at the amount of the new mortgage payment itself. And if you have neither a current housing payment nor any landlord experience, you can’t use rental income to qualify at all.9Fannie Mae. Rental Income If either applies to you, plan around it early, because it can shrink your borrowing power sharply.
Documents You’ll Need
A multi-unit application requires everything a standard home loan does, plus property-specific financials that prove the building can produce income. Missing documents cause delays that can kill a deal when the seller has backup offers.
On the personal side, lenders will ask for at least two years of federal tax returns with all schedules, two years of W-2 forms, and two months of recent bank statements. The statements trace the source of your down payment. Any large deposit that doesn’t match your paycheck needs a paper trail: gift from family, proceeds from selling a car, transfer between your own accounts.
On the property side, you need a current rent roll listing each tenant’s name, rent, and lease expiration, plus copies of every existing lease, because those agreements transfer to you at closing. The seller’s Schedule E from the past two years of tax returns shows actual income and expenses, and lenders cross-check it against the rent roll for discrepancies.
Request an estoppel certificate from each tenant as well. That’s a signed statement in which the tenant confirms the rent, security deposit, lease terms, and whether the landlord owes them anything. Without one, you’re relying on the seller’s word about each tenancy. A surprise after closing, like a tenant claiming they prepaid six months of rent, is expensive to resolve.
The application itself is the Uniform Residential Loan Application, Form 1003.10Fannie Mae. Uniform Residential Loan Application Form 1003 For multi-unit buyers, the critical entry is expected gross monthly rental income from the property. Guess low and you hurt your qualification. Inflate it and the appraisal will catch it. Use actual lease amounts or the appraiser’s market rent estimate.
Offer, Inspection, and Verifying the Units Are Legal
Your offer should include contingencies for financing, inspection, and appraisal. During the inspection period, the inspector examines each unit individually plus all shared systems: roof, plumbing, electrical, HVAC, and common areas like hallways and parking. Multi-unit inspections take longer and cost more than single-family inspections. Budget accordingly.
Beyond the physical inspection, pull the building’s certificate of occupancy from the local building department. It confirms how many legal units the building contains and what uses are permitted. If the seller advertises a four-unit but the certificate of occupancy shows three, the fourth may be an illegal conversion. Buying a building with unauthorized units creates insurance gaps, code violations, and possible orders to remove the extra space.
If the property was built before 1978, the seller must disclose any known lead-based paint hazards, provide all available testing records, and give you the EPA pamphlet “Protect Your Family from Lead in Your Home” before you sign a purchase contract. For multi-unit buildings, that includes records covering common areas and other tested units. The rule requires honesty about what the seller already knows; it does not force testing or removal.11Environmental Protection Agency. Lead-Based Paint Disclosure Rule Fact Sheet
Appraisal, Underwriting, and Closing
For two-to-four-unit buildings, the lender orders a Small Residential Income Property Appraisal Report on Fannie Mae Form 1025.12Fannie Mae. Appraisal Report Forms and Exhibits The appraiser compares the building to recent sales of similar multi-unit properties and analyzes current market rents. That report does double duty: it sets the value for the lender and provides the rent figures used in the FHA self-sufficiency test and in income qualification generally.
Underwriting and funding typically take 30 to 45 days. During that window, don’t open new credit accounts, make large purchases, or change jobs. Any shift in your financial profile triggers a re-evaluation that can delay or kill the loan.
Closing costs on a residential mortgage generally run 2% to 5% of the loan amount, paid on top of the down payment.13Fannie Mae. Closing Costs Calculator On a $500,000 mortgage, that’s $10,000 to $25,000 for title insurance, recording fees, lender charges, and prepaid property taxes and insurance. Once the deed is recorded, you own the building and inherit every tenant relationship, lease, and maintenance duty attached to it.
What Changes the Day You Own It
The mortgage closes and you become a landlord in the same afternoon. A few federal obligations kick in immediately, and getting them wrong creates exposure well out of proportion to the effort of complying.
Insurance
Standard homeowner’s insurance doesn’t cover rental units. Your lender will require proof of appropriate coverage before funding, which for a multi-unit means a landlord or dwelling fire policy. Landlord policies cover structural damage, premises liability for tenant injuries, and can include loss-of-rent coverage if a covered event makes units temporarily uninhabitable. If you’re living in one unit and renting the others, the policy needs to be structured for that mixed use. The wrong coverage leaves you personally exposed for on-site injuries and uninsured for rental income lost after a fire or storm.
Fair Housing
The Fair Housing Act prohibits discrimination in advertising, tenant screening, and lease terms based on race, color, religion, sex, national origin, familial status, or disability. It applies to every unit you rent. If a tenant or applicant with a disability requests a reasonable accommodation, such as keeping an assistance animal in a no-pets building, you must evaluate the request and grant it unless it imposes an undue burden or the specific animal poses a direct safety threat.14U.S. Department of Housing and Urban Development (HUD). Assistance Animals You cannot charge a pet deposit or pet fee for an assistance animal. Denying a legitimate accommodation request is one of the fastest ways to draw a HUD complaint.
Lead Paint Disclosure at Every New Lease
The lead disclosure obligation isn’t a one-time step at purchase. Every time you sign a new tenant into a pre-1978 unit, you must provide the EPA pamphlet, disclose known hazards, share any testing records, and include a signed lead warning statement in the lease. Keep signed copies for at least three years after the lease starts.11Environmental Protection Agency. Lead-Based Paint Disclosure Rule Fact Sheet Penalties for noncompliance include fines and potential civil liability if a tenant is harmed by lead exposure you failed to disclose.
Taxes
Owning a multi-unit building changes how you file. The rental portion of the building can be depreciated over 27.5 years, which produces a paper deduction that often wipes out much of the taxable rental income in the early years of ownership.15Internal Revenue Service. Publication 527 – Residential Rental Property Rental losses are treated as passive, so they generally can’t offset your wages, though up to $25,000 in losses can offset other income if you actively participate in managing the property and your modified adjusted gross income stays under $100,000, phasing out entirely at $150,000.16Internal Revenue Service. Publication 925 – Passive Activity and At-Risk Rules
When you eventually sell an owner-occupied multi-unit, the gain splits. The portion tied to your personal unit can qualify for the Section 121 exclusion of up to $250,000 in gain for single filers or $500,000 for married couples filing jointly, if you owned and lived there for at least two of the five years before the sale.17Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence The rental portion doesn’t qualify, is taxed as capital gain, and any depreciation you claimed is recaptured at a rate of up to 25%. Worth thinking about well before you list.